1211128863312 has 40 divisors (see below), whose sum is σ = 3136792669920. Its totient is φ = 402671800960.

The previous prime is 1211128863289. The next prime is 1211128863377. The reversal of 1211128863312 is 2133688211121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32413014 + ... + 32450357.

It is an arithmetic number, because the mean of its divisors is an integer number (78419816748).

Almost surely, 2^{1211128863312} is an apocalyptic number.

1211128863312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211128863312 is an abundant number, since it is smaller than the sum of its proper divisors (1925663806608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211128863312 is a wasteful number, since it uses less digits than its factorization.

1211128863312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64863771 (or 64863765 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The spelling of 1211128863312 in words is "one trillion, two hundred eleven billion, one hundred twenty-eight million, eight hundred sixty-three thousand, three hundred twelve".